Russian Prime Minister Vladimir Putin has vowed to find what caused the plane crash of Poland’s President Lech Kaczynski on Saturday.

Putin will head the inquiry into the accident that killed the Polish head of state and 96 others when his plane came down in Smolensk, western Russia.

The Russian premier said: “Everything must be done to establish the reasons for this tragedy in the shortest possible time.”

Reports indicate the pilot ignored requests to reroute to another airport weather shrouded the runway.